| Elwood P. Dowd | John Pearce |
| Harvey | as himself |
| Myrtle May Simmons | Louise Sutton |
| Vita Louise Simmons | Moira Duff |
| Ethel Chauvenet | Amy Grove-Rogers |
| Ruth Kelly | Anne Mitchell |
| Wilson | Ken Wilson |
| Dr. Lyman Sanderson | Jordan Petrou |
| Dr. William Chumley | Brian Jones |
| Betty Chumley | Elizabeth Barnes |
| Judge Gaffney | David Sutton |
| Edward J. Lofgren | Ken Walton |
| Director | Peter Goad |
| Producer | Geoffrey Mitchelmore |
